Github user stefanobaghino commented on the pull request:
https://github.com/apache/flink/commit/dd4e278545182f0d4cbf403911f550c1badde125#commitcomment-15677128
I can further improve the examples using `case classes` in the Scala
example. Doing it while retaining the usage of inheritance would involve making
a `trait` for both the `Point` and `Centroid` to inherit from.
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